To do so, in the “Source” dropdown, choose Facebook (see image below). Click the “Invite Facebook Friends” button and you’ll be prompted to enter your Facebook login credentials.
Enter the friends names you’d like to include into your deck.
Once you’re done adding the names you’d like to invite, click “Post to Facebook” and those friends will be invited to join your deck in OurCards. Once they accept your invitation, they’ll appear in your list of people who can be assigned to OurCards!